CVE-2026-12413
CVE-2026-12413: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-12413] IKEv2 Denial of Service via malformed fragmentation
CVE-2026-12413Source published Source updated
An invalidly formatted IKEv2 fragment causes the Libreswan pluto daemon to crash and restart. Continued exploitation would cause a denial of service. The function reassemble_v2_incoming_fragments() would ignore unknown outer payloads but still store these in a fixed size array msg_digest.digest[PAYLIMIT]. An off-by-one error in the assertion PASSERT(logger, md->digest_roof digest)) causes the daemon to abort. No remote code execution is possible. Any configuration that allows IKEv2 connections that do not set fragmentation=no are vulnerable. IKEv1 is not affected. A flaw was found in Libreswan's IKEv2 fragment reassembly mechanism. When a VPN gateway processes incoming split network packets (fragments) containing unexpected data, an off-by-one boundary validation error triggers an…
- Affected products in this advisory
- Fast Datapath for Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9.6 Extended Update Support
2 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- libreswan-0:5.3.2-1.el9fdp
- libreswan-0:5.3.2-1.el10_2
- libreswan-0:5.2-1.el10_0.5
- libreswan-0:4.12-2.el8_10.6
8 more entries in the full advisory.
- Mitigation guidance
- If upgrading to Libreswan is not an option, you can mitigate the vulnerability by disabling IKEv2 fragment processing: Add the following directive to your global or connection-specific configuration files in /etc/ipsec.conf: ```fragmentation=no``` Warning: Disabling fragmentation may cause larger IKEv2 payloads (such as those carrying large X.509 certificate chains) to be dropped by intermediate network routers if they exceed the path MTU.
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